what kind of division can perform normal growth and development for the embryo & why

Activity 8: Sequencing Meiotic StagesLabel the stage of meiosis in each box below each diagram. Then, cut out each figure and arrange the cells so they reflect the proper order of stages of meiosis -starting with a cell in interphase and ending with the completion of meiosis. Write the letter sequence of the cells in your Lab, Activity #8.AMeiosis in animal cell

what does a "fetal development" concept map look like with 10 words or phrases?

What is your opinion of the status of an 8-celled human embryo? Why?

Which type of symmetry is associated with cephalization?Why is it important? What is usually associated with cephalization?

PART 4: Indicate whether each statement refers to mitosis (MI), meiosis (ME), both (B) or neither (N)     _______________ Tetrads are formed _______________ Division starts with haploid cells _______________ Chromosome number is reduced _______________ Amount of DNA in cells is reduced _______________ Results in the formation of diploid cells _______________ Sister chromatids are separated _______________ Leads to genetic variation _______________ Is a part of asexual reproduction _______________ Homologous pairs are separated _______________ Results in the formation of 4 diploid cells

Do the egg and sperm each need to contain 46 chromosomes?

..explain why meiosis occurs only in specialized cells (gametes), and that the overall goal of meiosis is to make haploid cells for sexual reproduction • ..outline the sequence of key chromosomal movements and rearrangements during the two meiotic divisions, identifying key similarities and differences between meiosis and mitosis • ..describe the ploidy of a cell before and after meiosis I and meiosis II, and how ploidy changes after separation of sister chromatids and homologous chromosomes

how can brain cancer affect birth?  How does brain cancer affect fetal development?

6)From the menu on the left on Virtual Urchin, click on "embryogenesis to hatching". This will display a video of sea urchin development. Photos of key stages taken with a scanning electron microscope (SEM) are shown next to the video. In addition to watching the video by clicking the play button, you can use the slider at the bottom to move through the stages step by step. Doing this will allow you watch how cell division increases the number of cells from the initial zygote. You'll notice that these divisions start off dividing cells evenly, but at a certain point, there are some smaller cells created. These smaller cells will play very important roles in the later development stages of the urchin, so their creation is a key milestone.   Which round of cell division is uneven? (hint: the SEM images will be helpful) a)First b)Second c)Third d)Fourth e)Fifth